Duncan is the King of Scotland, an old, gracious, pious and gentle man, who resembles Lady Macbeth’s father in his sleep.
He is somewhat too trusting, and will be betrayed twice by Thanes of Cawdor he trusted in the space of a very few days. He does not fight on the front line himself, but leaves this duty to others. He is nevertheless quite prepared to pronounce sentence of death on traitors. He promises to improve the fortunes of his victorious generals Banquo and Macbeth just before announcing Malcolm as his heir. He is stabbed to death in his sleep by Macbeth.